High levels of cholesterol in the blood increase the risk of heart disease. For 14-year-old boys, the distribution of blood cholesterol is approximately normal with mean = 170 milligrams of cholesterol per deciliter of blood (mg/dl) and standard deviation = 30 mg/dl. Let X = the cholesterol level of a randomly selected 14-year-old boy. A. Cholesterol levels above 240 mg/dl may require medical attention. Find and interpret P(X > 240). People with cholesterol levels between 200 and 240 mg/dl are at considerable risk for heart disease. What percent of 14-year-old boys have blood cholesterol between 200 and 240 mg/dl? C What cholesterol level would place a 14-year-old boy at the 10th percentile of the distribution? 4 "Apples" Suppose that the weights of a certain variety of apples have weights that are approximately Normally distributed with a mean of 9 ounces and a standard deviation of 1.5 ounces. If bags of apples are filled by randomly selecting 12 apples, what is the probability that the sum of the weights of the 12 apples is less than 100 ounce